
living on a PLANET populated
with nothing but dogs.
The Big Bang Theory Season 5, Episode 21

Yes, assuming the hypothetical PLANET
has a mass greater than the Earth.
The Big Bang Theory Season 1, Episode 13

and the ability to destroy a
PLANET at the push of a button.
The Big Bang Theory Season 7, Episode 22

Did you see Stargate
where they found themselves on a PLANET...
The Big Bang Theory Season 2, Episode 16